How do I make my Game notice by Youtubers

I m Working on a game for steam the game is platformer horror its been 6 months I'm working on the project all i need is that how can I make Big Youtubers play my game so it can get attention and Boost sales

Send them an email ? or comment on their work or you know they are people so do what you need to get in contact with them.

Go to their profile and there should be a clickable about see if they have placed their email in their and send them a friendly greeting and ask them if they like to play your game and provide them a free key or copy of that game.